Loose-leaf binder



March 18, 1930. J. c. DAWSON 1,

LOOSE LEAF BINDER Filed Dec. 28, 1926 Patented Mar. 18, 1930 UNITED STATES.

PATENT OFFICE JAMES C. DAWSON, E WEBSTER eEovEs, Mrsso aI, ASSIGNOR T0 ZELMA n'fnnwson,

- 015 WEBSTER eEovEs', MISSOURI LOOSE-LEAF BINDER Application filed December 28, 1926. Serial No. 157,465.

This invention relates to loose leaf binders of the type commonly used for catalogues; and has for its principal object to produce a simple structure that will permit the leaves to be readily inserted and removed.

Further objects and advantages of the invention will be revealed as the description is read in connection with the accompanying drawings, in which Fig. 1 is a plan view of a binder embodying the invention;

Fig. 2 is a longitudinal sectional View of Fig. 1. y

The fundamental structure includes a lower binder bar 10 and an upper binder bar 11, each being of angular form and having their vertical portions 12 and 13 lying alongside and cooperating to close the rear edge of the binder. The covering material 14: passes around these angular bars and the material formlng the cover leaves 15, which are hinged to the binder bars by said covering material.

A pair of stout posts 16 are riveted to the lower binder bar 10 and extend upwardly therefrom a suitable distance.

In binders of this type in common use the upper bar 11 is secured to the lower bar by screws threaded into the posts 16, and having heads bearing against the upper bar. With such a structure the removal or replacement or insertion of a sheet requires that two screws be entirely removed as an initial operation in opening the binder, and the same two screws be found and replaced as a final operation in closing the binder. This has proved to be objectionable in use, and the principal object of this invention is to sup plant these screws with a more acceptacle and easily operated mechanism.

As shown herein, the posts 16 are internally threaded and receive screws 20, having relatively small heads 21 that can pass through the perforations 22 in the upper binder bar, spaced to correspond with the spacing of th posts 16.

Slidably mounted on the upper bar 11 is a latch bar 23, provided with key-hole slots 24 adapted to cooperate with the heads 21 to secure or release the binder parts.

Sleeves 37 are fixed to the upper binder bar 11 and extend downwardly from the margins of the perforations 22 in telescopic relation'with the posts 16.

A latch bar guide 28 is rigidly secured to the upper binder bar 11 by headed rivets 49 which extend through guide slots 26 in the latch bar 23, and protects the. covering material 1 1 from wear due to the movement of the latch bar. The guide bar is provided, preferably at the middle, with a depression 29, adapted to receive a projection 30 on the lower end of a rivet 31, by which the knurled knob 32 is secured to the latch bar. The engagement between the project-ion 30 and the depression 29 serves to hold the latch bar firmly in place at all times during use.

When it is desired to unlatch the binder lateral pressure on the knob 32 will cause the curved surface of the projection to ride out of the depression and permit the latch bar to be released. This, of course, will require the latch bar to spring upwardly, which is permitted by the relatively great distance between the rivets 49.

I claim as my invention- 1. In a loose leaf binder, the combination of a lower binder bar, a post on said bar having means provided with a small head, an upper binder bar having a perforation permitting the head to pass through, a latch bar guide on the upper binder bar, means on the upper binder bar passing through said latch bar guide for attaching the latter there'- to, and a latch bar slidably mounted on the guide bar and cooperating with the head of the post to lock the parts together and guided in its movement on the guide bar by said attaching means for the guide bar.

2. In a loose leaf binder, the combination of a lower binder bar and an upper binder bar, cover leaves for each of said binder bars,

means for flexibly connecting the cover leaves to the binder bars, a post on said lower binder bar having means provided with a small head, said upper bar having a perforation permitting the head of the post to pass therethrough, a latch bar guide mounted on said upper binder bar and superimposed upon said flexible means, means carried by said' JAMES- G. DAWSON" 

